I change over to Mobil 1 Delvac (snythentic), with 150K miles on he car and have no leaks or problems. I did a lot of research on this before I switched and all I could find was some cars would leak a little, but most cars do anyway...

ps: I switched to Mobil 1 in my Landrover and it gets more MPG..

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976